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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 731 · 40 questions
TalentJR

Code tip (Dot for class, hash for id): p matches every <p>; .note matches class="note"; #top matches id="top". A dot means class, a hash means id — mixing them up matches nothing. Many elements can share a class; an id belongs to only one element.

NameDateTime takenScore ___ / 40
  1. 1.True or false: .note is a class selector. (a) True (b) False
  2. 2.True or false: li is a class selector. (a) True (b) False
  3. 3.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1>     (a) h2 (b) #big (c) #logo (d) .red
  4. 4.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
  5. 5.True or false: #main is an id selector. (a) False (b) True
  6. 6.🎯 Which element does the selector .menu style? (a) <h1 id="menu"> (b) <h2 class="big"> (c) <h1 class="note"> (d) <h1 class="menu">
  7. 7.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1>     (a) #intro (b) #menu (c) #top (d) h2
  8. 8.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2>     (a) h2 (b) .end (c) .menu (d) #star
  9. 9.🎯 Can many elements share the same class? (a) Yes (b) No
  10. 10.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
  11. 11.🎯 Which sign starts an id selector? (a) . (b) & (c) @ (d) #
  12. 12.🎯 Which element does the selector span style? (a) <h2 id="end"> (b) <p> (c) <span class="box"> (d) <h1 class="box">
  13. 13.🎯 Which sign starts a class selector? (a) # (b) . (c) @ (d) &
  14. 14.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span>     (a) #box (b) .box (c) .star (d) p
  15. 15.🎯 Which element does the selector .big style? (a) <h2 class="big"> (b) <li class="box"> (c) <h2 id="big"> (d) <h2 class="red">
  16. 16.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p>     (a) #red (b) p (c) #intro (d) .top
  17. 17.True or false: .star is an id selector. (a) False (b) True
  18. 18.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2>     (a) .menu (b) li (c) .hero (d) #hero
  19. 19.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li>     (a) div (b) li (c) #menu (d) .note
  20. 20.🎯 Which element does the selector #main style? (a) <span class="main"> (b) <p class="star"> (c) <span id="main"> (d) <span id="logo">
  21. 21.True or false: img is a class selector. (a) False (b) True
  22. 22.🎯 How many elements on a page should have the same id? (a) 1 (b) 5 (c) any number (d) 2
  23. 23.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2>     (a) li (b) .main (c) #main (d) #big
  24. 24.🎯 What kind of selector is .note? (a) an id selector (b) a class selector (c) an element selector
  25. 25.True or false: .menu is a class selector. (a) False (b) True
  26. 26.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
  27. 27.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
  28. 28.🎯 Which element does the selector #hero style? (a) <p id="hero"> (b) <p class="hero"> (c) <h1 class="box"> (d) <p id="top">
  29. 29.🎯 Which element does the selector .box style? (a) <li class="star"> (b) <div class="menu"> (c) <li class="box"> (d) <li id="box">
  30. 30.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
  31. 31.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1>     (a) #intro (b) h1 (c) .top (d) .star
  32. 32.True or false: .big is a class selector. (a) False (b) True
  33. 33.🎯 Which element does the selector #end style? (a) <div id="hero"> (b) <div class="end"> (c) <div id="end"> (d) <span class="note">
  34. 34.🎯 Which CSS selector matches this element?
    <span class="star" id="hero">Hello</span>     (a) .hero (b) #star (c) .star (d) .menu
  35. 35.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span>     (a) .end (b) p (c) #big (d) #end
  36. 36.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
  37. 37.🎯 Which CSS selector matches this element?
    <li class="star" id="intro">Hello</li>     (a) .intro (b) .star (c) div (d) #star
  38. 38.🎯 Which element does the selector .red style? (a) <span class="box"> (b) <span id="red"> (c) <span class="red"> (d) <p class="star">
  39. 39.🎯 Which element does the selector .red style? (a) <div class="star"> (b) <li class="box"> (c) <li class="red"> (d) <li id="red">
  40. 40.🎯 Which element does the selector .box style? (a) <h1 id="box"> (b) <h2 class="menu"> (c) <h1 class="star"> (d) <h1 class="box">

Answer key

  1. True
  2. False
  3. #logo
  4. an id selector
  5. True
  6. <h1 class="menu">
  7. #top
  8. h2
  9. Yes
  10. a class selector
  11. #
  12. <span class="box">
  13. .
  14. .box
  15. <h2 class="big">
  16. p
  17. False
  18. #hero
  19. li
  20. <span id="main">
  21. False
  22. 1
  23. #main
  24. a class selector
  25. True
  26. a class selector
  27. an id selector
  28. <p id="hero">
  29. <li class="box">
  30. an element selector
  31. h1
  32. True
  33. <div id="end">
  34. .star
  35. #end
  36. a class selector
  37. .star
  38. <span class="red">
  39. <li class="red">
  40. <h1 class="box">

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